295/40R22 vs 305/45R22
305/45R22 is outside the ±3% rule as a replacement for 295/40R22: the diameter differs by +4.84%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 305/45R22 on a car calibrated for 295/40R22, the speedometer reads 57.2 mph when you're really doing 60, and the odometer under-counts by 4.8%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.5 mph |
| 45 mph | 47.2 mph |
| 60 mph | 62.9 mph |
| 70 mph | 73.4 mph |
| 80 mph | 83.9 mph |
Other sizes close to 295/40R22
- 295/40R22 vs 285/45R22+2.58%
- 295/40R22 vs 275/50R22+4.91%
- 295/40R22 vs 275/40R22-2.01%
- 295/40R22 vs 265/40R22-3.02%
- 295/40R22 vs 285/35R22-4.59%
- 295/40R22 vs 285/40R22-1.01%
- 295/40R22 vs 285/45R21-0.62%
- 295/40R22 vs 275/45R22+1.45%
- 295/40R22 vs 305/40R22+1.01%
- 295/40R22 vs 325/35R22-1.07%
- 295/40R22 vs 315/35R22-1.95%
- 295/40R22 vs 295/35R22-3.71%
Questions
Can I replace 295/40R22 with 305/45R22?
305/45R22 is outside the ±3% rule as a replacement for 295/40R22: the diameter differs by +4.84%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 295/40R22 and 305/45R22?
305/45R22 is 1.52" taller and 10 mm wider; the sidewall is +0.76". At an indicated 60 mph you'd actually be doing 62.9 mph.
Will 305/45R22 fit on 295/40R22 wheels?
Both use a 22" rim, so the wheel diameter matches; check the wheel's width range for a 305 mm tire and the fender clearance.